Lear Siegler, Inc. (LSI) manufactured its first video display terminal in 1972 – the 7700A.
In 1973, LSI hired a new … See more

The ADM-3 followed and the first manufactured units were introduced at 1975 National Computer Conference in Anaheim, Calif., May 19–22, 1975, in booth 2348 at a price of $995. Its innovative wave soldered single boar… See more

The original ADM-3 terminal displayed only capital letters. In 1976, an option was added to allow it to display both lower and upper case. The standard version of the terminal displayed only twelve (rather than twenty-four… See more

In 1976, the ADM-3A was introduced. The ADM-3A added support for control codes to move the cursor around on the screen, and directly position the cursor at any point in the display. It did not, however, support “clear to en… See more

The 5×7 dot matrix characters were displayed in amber, green, or white phosphor on black (the cursor was 7×9). The keyboard had 59 keys. The 12-inch monochrome CRT was mounted in the top half of the c… See more

The use of the HJKL keys for moving the cursor in the vi editor and its descendants originated from the ADM-3A, University of California, Berkeley's Teletype Model 33 replacement, just prior to the vi editor's creation; th… See more

• Teletype Model 33 See more